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我在我的项目中使用了Zend Framework。我需要插入多个记录，并且发现Zend_Db在my_sql查询（多次）中出人意料地比较慢，这让我觉得我做错了什么。 这里有两个例子。为什么Zend_Db_Adapter比mysql_query慢得多
Zend_Db_Adapter会：
$startTime = microtime(true);
$db = Zend_Db_Table::getDefaultAdapter();
$db->beginTransaction();
$dateAdded = date('Y-m-d H:i:s');
$lastChanged = $dateAdded;
foreach ($importDataNamespace->data as $subscriberNum => $subscriber)
{
foreach ($fieldsMap as $fieldNumber => $fieldTag) {
if (isset($subscriber[$fieldNumber])) {
$subscriberData[$fieldTag] = $subscriber[$fieldNumber];
} else {
$subscriberData[$fieldTag] = '';
}
}
$query = 'INSERT INTO subscribers (list_id, account_id, email_address, first_name, last_name, date_added, last_changed) ' .
'VALUES (' . 52 . ', ' . 29 . ', ' . $db->quote($subscriberData['EMAIL']) . ', ' . $db->quote($subscriberData['FNAME']) .
', ' . $db->quote($subscriberData['LNAME']) . ', ' . $db->quote($dateAdded) . ', ' . $db->quote($lastChanged) . ')';
$db->query($query);
}
$db->commit();
$this->view->time = microtime(true) - $startTime;
实施例与的mysql_query：
$startTime = microtime(true);
$user = 'root';
$password = 'password';
$db = 'database';
$connect = @mysql_connect('localhost',$user,$password) or die("Failed to connect database");
@mysql_select_db($db) or die("Failed to select database");
$dateAdded = date('Y-m-d H:i:s');
$lastChanged = $dateAdded;
$result = mysql_query('SET autocommit = 0');
foreach ($importDataNamespace->data as $subscriberNum => $subscriber)
{
foreach ($fieldsMap as $fieldNumber => $fieldTag) {
if (isset($subscriber[$fieldNumber])) {
$subscriberData[$fieldTag] = $subscriber[$fieldNumber];
} else {
$subscriberData[$fieldTag] = '';
}
}
$query = 'INSERT INTO subscribers (list_id, account_id, email_address, first_name, last_name, date_added, last_changed) ' .
'VALUES (' . 52 . ', ' . 29 . ', \'' . mysql_real_escape_string($subscriberData['EMAIL']) . '\', \'' . mysql_real_escape_string($subscriberData['FNAME']) .
'\', \'' . mysql_real_escape_string($subscriberData['LNAME']) . '\', \'' . $dateAdded . '\', \'' . $lastChanged . '\')';
mysql_query($query);
}
$result = mysql_query('SET autocommit = 1');
$result = mysql_query('COMMIT;');
$this->view->time = microtime(true) - $startTime;
在第一种情况用了14.8秒，在第二3.7。 你能告诉我为什么它会发生，你做错了什么？
如果我删除任何报价Zend_Db的需要12秒内从14报价，但它仍然远远超过用的mysql_query慢：
$startTime = microtime(true);
$db = Zend_Db_Table::getDefaultAdapter();
$db->beginTransaction();
$dateAdded = date('Y-m-d H:i:s');
$lastChanged = $dateAdded;
foreach ($importDataNamespace->data as $subscriberNum => $subscriber)
{
foreach ($fieldsMap as $fieldNumber => $fieldTag) {
if (isset($subscriber[$fieldNumber])) {
$subscriberData[$fieldTag] = $subscriber[$fieldNumber];
} else {
$subscriberData[$fieldTag] = '';
}
}
$query = 'INSERT INTO subscribers (list_id, account_id, email_address, first_name, last_name, date_added, last_changed) ' .
'VALUES (' . 52 . ', ' . 29 . ', \'' . $subscriberData['EMAIL'] . '\', \'' . $subscriberData['FNAME'] .
'\', \'' . $subscriberData['LNAME'] . '\', \'' . $dateAdded . '\', \'' . $lastChanged . '\')';
$db->query($query);
}
$db->commit();
$this->view->time = microtime(true) - $startTime;
感谢您对这个问题的任何信息。
这段代码使用约0.065秒的mysql_query：
$dateAdded = date('Y-m-d H:i:s');
$lastChanged = $dateAdded;
$startTime = microtime(true);
$result = mysql_query('BEGIN');
for ($i = 0; $i < 100; $i++) {
$email = 'test_ ' . $i . '@gmail.com';
$query = 'INSERT INTO subscribers (list_id, account_id, email_address, first_name, last_name, date_added, last_changed) ' .
'VALUES (' . 52 . ', ' . 29 . ', \'' . mysql_real_escape_string($email) . '\', \'' . mysql_real_escape_string($firstName) .
'\', \'' . mysql_real_escape_string($lastName) . '\', \'' . mysql_real_escape_string($dateAdded) . '\', \'' . mysql_real_escape_string($lastChanged) . '\')';
mysql_query($query);
}
$result = mysql_query('COMMIT');
$time = microtime(true) - $startTime;
echo 'Using mysql_query: ' . $time . '<br />';
exit();
代码Zend_Db_Adapter对象基准（我甚至没有使用引号在这种情况下）：
$db = Zend_Db_Table::getDefaultAdapter();
$db->getProfiler()->setEnabled(true);
$profiler = $db->getProfiler();
$startTime = microtime(true);
$db->beginTransaction();
for ($i = 0; $i < 100; $i++)
{
$email = 'test_' . $i . '@gmail.com';
$query = 'INSERT INTO subscribers (list_id, account_id, email_address, first_name, last_name, date_added, last_changed) ' .
'VALUES (' . 52 . ', ' . 29 . ', \'' . $email . '\', \'' . $firstName .
'\', \'' . $lastName . '\', \'' . $dateAdded . '\', \'' . $lastChanged . '\')';
$db->query($query);
}
$db->commit();
$time = microtime(true) - $startTime;
echo 'Time of transaction Zend_Db_Adapter query: ' . $time . '<br />';
echo 'Total time ' . $profiler->getTotalElapsedSecs() . '<br />';
$count = 0;
$totalTime = 0;
foreach ($profiler->getQueryProfiles() as $query) {
$count++;
$elapsedTime = $query->getElapsedSecs();
$totalTime += $elapsedTime;
echo $count . ' ' . $elapsedTime . ' ' . $query->getQuery() . '<br />';
}
echo 'Sum time: ' . $totalTime . '<br />';
这里有一些结果：
交易查询Zend_Db_Adapter会时间：0.23094701767 总时间0.0949234962463 1 0.00199699401855连接 2 0.000336885452271开始 3 0.000540018081665 INSERT INTO订户（list_id，account_id，email_address，first_name，last_name，date_added，last_changed）VALUES（52,29，'[email protected]'，'John'，'Clinton'，'2011- 01-28 15:25:21'，'2011-01-28 15:25:21'） 4 0.000504016876221 INSERT INTO订户（list_id，account_id，email_address，first_name，last_name，date_added，last_changed）VALUES（52，29， '[email protected]'，'John'，'Clinton'，'2011-01-28 15:25:21'，'2011-01-28 15:25:21'）
这很奇怪。插入100条记录的交易时间是执行所有查询的2.5倍。 如果我试图在循环中形成字符串的时间（如果我们删除查询）并没有花费太多时间。
如果你有一个有大量数据的大系统，你可能会认为doctrine2是一个ORM – Tjorriemorrie 2011-01-28 08:07:02
是的，它会有相当多的数据。但Zend_Db_Adapter的问题仍然不清楚，是什么原因需要这么长时间。 – Oleg 2011-01-28 12:20:09